A man who admitted to being an accessory to the murder of Sydney businessman Michael McGurk has been sentenced to more than six years' jail.

In September 2009, 24-year-old Christopher Estephan drove to Mr McGurk's Cremorne home with another man, Haissam Safetli.

McGurk was shot dead at close range in front of his young son.

Safetli dismantled the modified rifle and discarded it.

The judge was unable to find Estephan had any prior knowledge of the plan to murder Mr MrGurk or that the gun was concealed in a bag.

For the accessory offence and two firearm charges, he imposed a total sentence of six years and five months.

Justice Geoffrey Bellew told the court:

"Questions of misguided loyalty aside, the offending represented a choice by the offender to place the interests of the principal offender ahead of those of the victim, and/or the public generally. That, on any view, is serious conduct for which the only appropriate punishment is full time imprisonment," he said.

"The evidence does not permit me to reach any conclusion about precisely what the offender knew prior to attending the deceased's premises on 3 September 2009, or why he thought he was being asked to go there.

"I am not satisfied beyond reasonable doubt that the offender was aware that the murder weapon had been secreted in a bag which had been placed in the vehicle in which he travelled to the deceased's premises."

With time served, Estephan will be eligible for parole in October next year.